The United States is removing four Patriot anti-missile systems from the Middle East, including two that were guarding oil fields in Saudi Arabia. In addition, dozens of U.S. military personnel that were temporarily deployed to the region last year will be moved. The United States previously removed two jet fighter squadrons from the region and is considering reducing its naval presence. U.S. officials say that the moves mark the end of a year-long military buildup to counter Iran.